# Maths

Evaluate the expression √−7/√ −6√−5 and write the result in the form a+bi.
I keep getting b as 0.483i but apparently its wrong?

1. Well, you need to work on using parentheses

√−7/√−6√−5 means (√−7/√−6)(√−5)
= 7i/6i * 5i
= 35i^2/6i
= 35/6 i = 5.83i

√−7/(√−6√−5) = 7i/-30 = -0.233i

0.483 = 29/60

Or is there a typo in the problem?

posted by Steve
2. Tried that answer as well but the website is till telling me its wrong. Could be a typo will have to check with the instructor.

posted by Amelia

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